County Townships Open for 2026 Property Tax Year:
Tax Appeals Lake County deadlines prior to County.

Request Assessment Review

Lake County Tax Appeal Deadline Dates:

Antioch: OPEN
Avon: OPEN
Benton: August 24th  
Cuba: OPEN
Ela: August 24th
Fremont: OPEN
Grant: OPEN
Lake Villa: OPEN
Libertyville: OPEN 
Moraine: OPEN
Newport: OPEN
Shields: OPEN
Vernon: OPEN 
Warren: OPEN
Wauconda: OPEN
Waukegan: OPEN
West Deerfield: OPEN
Zion: OPEN                                                 

McHenry County Tax Appeal Deadline Dates:

Chemung: August 13th
Alden: OPEN
Burton: OPEN
Hebron: OPEN
Richmond: August 6th
Dunham: OPEN
Hartland: OPEN 
Greenwood: OPEN
McHenry: OPEN
Marengo: OPEN
Seneca: OPEN
Dorr: August 21st
Nunda: OPEN
Riley: OPEN
Coral: OPEN
Grafton: OPEN 
Algonquin: OPEN

DuPage County Tax Appeal Deadline Dates: 

Addison: OPEN
Bloomingdale: OPEN
Downers Grove: OPEN
Lisle: OPEN
Milton: OPEN
Naperville: OPEN
Wayne: OPEN
Winfield: OPEN
York: OPEN